Structured comments updated.

[lincan.git] / lincan / src / close.c

diff --git a/lincan/src/close.c b/lincan/src/close.c
index 7ac357465418c21036e890950ff9d3eed5ac1620..9042ff2a2ec0d4e188dd2a12cad32315e8c458cf 100644 (file)
--- a/lincan/src/close.c
+++ b/lincan/src/close.c
@@ -1,45 +1,60 @@
 /* close.c
  * Linux CAN-bus device driver.
  * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
+ * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
+ * email:pisa@cmp.felk.cvut.cz
  * This software is released under the GPL-License.
- * Version 0.7  6 Aug 2001
+ * Version lincan-0.2  9 Jul 2003
  */
 
-#define __NO_VERSION__
-#include <linux/module.h> 
-
-#include <linux/autoconf.h>
-#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS)
-#define MODVERSIONS
-#endif
-
-#if defined (MODVERSIONS)
-#include <linux/modversions.h>
-#endif
-
-#include <linux/fs.h>
-
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
 #include "../include/main.h"
 #include "../include/close.h"
 #include "../include/i82527.h"
 #include "../include/setup.h"
+#include "../include/fasync.h"
+
+#define __NO_VERSION__
+#include <linux/module.h>
 
 int can_close(struct inode *inode, struct file *file)
 {
-       /* Give up message buffer memory */
-       if (objects_p[MINOR_NR]->fifo->buf_tx_entry)
-               del_mem_from_list(objects_p[MINOR_NR]->fifo->buf_tx_entry);
-       else
-               CANMSG("objects_p[MINOR_NR]->fifo->buf_tx_entry is NULL\n");
-       if (objects_p[MINOR_NR]->fifo->buf_rx_entry)
-               del_mem_from_list(objects_p[MINOR_NR]->fifo->buf_rx_entry);
-       else
-               CANMSG("objects_p[MINOR_NR]->fifo->buf_rx_entry is NULL\n");
-
-/* FIXME: what about clearing chip HW status, stopping sending messages etc? */
+       struct canuser_t *canuser = (struct canuser_t*)(file->private_data);
+       struct canque_ends_t *qends;
+       struct msgobj_t *obj;
+       can_spin_irqflags_t iflags;
        
-       objects_p[MINOR_NR]->flags &= ~OPENED;
-       MOD_DEC_USE_COUNT;
+       if(!canuser || (canuser->magic != CAN_USER_MAGIC)){
+               CANMSG("can_close: bad canuser magic\n");
+               return -ENODEV;
+       }
+       
+       obj = canuser->msgobj;
+       qends = canuser->qends;
+       
+    #ifdef CAN_ENABLE_KERN_FASYNC
+
+       can_fasync(-1, file, 0);
+
+    #endif /*CAN_ENABLE_KERN_FASYNC*/
 
+       can_spin_lock_irqsave(&canuser_manipulation_lock, iflags);
+       list_del(&canuser->peers);
+       can_spin_unlock_irqrestore(&canuser_manipulation_lock, iflags);
+       canuser->qends = NULL;
+       canqueue_ends_dispose_kern(qends, file->f_flags & O_SYNC);
+
+       kfree(canuser);
+
+       can_spin_lock_irqsave(&canuser_manipulation_lock, iflags);
+       if(atomic_dec_and_test(&obj->obj_used)){
+               can_msgobj_clear_fl(obj,OPENED);
+       };
+       can_spin_unlock_irqrestore(&canuser_manipulation_lock, iflags);
+       
+    #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,50))
+       MOD_DEC_USE_COUNT;
+    #endif
        return 0;
 }